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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 26 — Dec. 25, 2006
  • pp: 13014–13020

Etendue-preserving mixing and projection optics for high-luminance LEDs, applied to automotive headlamps

Aleksandra Cvetkovic, Oliver Dross, Julio Chaves, Pablo Benítez, Juan C. Miñano, and Rubén Mohedano  »View Author Affiliations


Optics Express, Vol. 14, Issue 26, pp. 13014-13020 (2006)
http://dx.doi.org/10.1364/OE.14.013014


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Abstract

By having a single optical element combine the light of several high luminance LEDs, a high luminance light source can be formed, with shape and emission characteristics adaptable to nearly all illumination problems. The illuminance distribution of this virtual source facilitates the generation of the desired intensity pattern via its imaging-stye projection into the far field. This projection is achieved by one refractive and one reflective freeform surface, both calculated simultaneously by the 3D SMS method, which is herein demonstrated for an LED automotive headlamp.

© 2006 Optical Society of America

OCIS Codes
(220.2740) Optical design and fabrication : Geometric optical design
(220.3620) Optical design and fabrication : Lens system design

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: June 6, 2006
Revised Manuscript: December 13, 2006
Manuscript Accepted: December 20, 2006
Published: December 22, 2006

Citation
Aleksandra Cvetkovic, Oliver Dross, Julio Chaves, Pablo Benitez, Juan C. Miñano, and Rubén Mohedano, "Etendue-preserving mixing and projection optics for high-luminance LEDs, applied to automotive headlamps," Opt. Express 14, 13014-13020 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-26-13014


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References

  1. J.-H. Park and J.-Y. Sah, "Design of reflector optics with smooth surface for automotive lamps," in SAE 2001 World Congress: Lighting Technology, SAE Technical Papers, 2001.
  2. V. I. Oliker and O. von Tempski, "On the design of reflectors with prespecified distribution of virtual sources and intensities," Inverse Probl. 14, 661-678 (1998). [CrossRef]
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  15. For reflector characteristics see www.3m.com
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